Unstable OC in recent drivers

Dunno what happened, but recent drivers made my OC highly unstable. In games like Evolve, or Serious Sam Fusion, everything goes fine, until GPU usage spikes to 100% without reason and it gives "device hung" error. Both games were fine before with my OC. Is this a known bug or something?

Just to mention that, later drivers changing overclocks has been here before, this is not the first time. Did you try to step down a single bin of your GPU? That usually helps, if you can't push in any more voltage.

Just to mention that, later drivers changing overclocks has been here before, this is not the first time. Did you try to step down a single bin of your GPU? That usually helps, if you can't push in any more voltage.

Well that's something you didn't meantion
What's the voltage difference for that OC drop with your card? At what voltage could you reach +150 and +115 before?
Can you install older drivers to see if the OC is still stable?

Oddly enough I've noticed this myself. I had my 1080 at +200, reaching 2114 in every game. But ever since the 388.x I started dropping it down until i found a stable +160 which does around 2038-2050
but even then in some cases games don't even boost the card normally even though gpu utilization is at max. Like NFS Payback and Battlefront 2. In older titles since my voltage is at +100 it goes up
to 1.091v, but in newer titles it does 1.014v max and the core does 1876. Even if i change clocks in whilst watching them in real time in the game nothing changes. GTA 5 started crashing everytime
the core goes pass 2050 for some reason. But the card is stable as hell. I can do almost 2.2Ghz at synthetic benchmarks, temps are fine, around 75c at 2.1ghz but still, voltage spikes around and thats
what i think makes everything unstable. Older drivers didn't do this though.